Bending brake



T. J. KELLEHER Oct. 20 1925.

BENDING BRAKE Fid April 1e. 1924 2 Sheets-Sheet 1 lavez?, 2,0m /'gamas CTLZeeP Patented Oct. 20, 1925.

UNITED STATES THOMAS J. KELLEHER, OF CHICAGO, ILLINOIS.

BENDING BRAKE.

Application led April 16, 11924.

To all whom t may concern.'

Be it known that I, THOMAS J. linternas, a citizen ,nf the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bending Brakes, of which the following, reference being had to the drawings accompanying and forming a part hereof, is a specification.

This invention relates to bending brakes by means of which sheet metal of slight and of considerable thickness is bent or folded.

Among the objects of the invention are to lessen the number of parts. and the cost of a bending brake having determined strength and rigidity; to obtain a brake of the kind named which is durable andA not liable to get out of order, or to become broken, and which is easily adjusted to bend different thicknesses of metal; to obtain a brake by means of which a portion of a` sheet of metal may be bent, to at least ninety degrees, and the remainder of said sheet will not be bent or folded; and a brake which is easily understood and operated by men skilled in the art of bending sheet and bar metal.

In the drawings referred to and illustrating the invent-ion, F igure 1 is an end elevation of a bending brake embodying the invention Fig. 2 is central vertical section of the brake which is` illustrate-d in Fig. 1;

Fi'gs is a front elevation of the bending` leaf or apron of the brake, removed from the remainder thereof;

Fig. 4 is a top plan view of a sheet metal plate or blank from which the inclined member and part of theends of the upper member of the jaw of the brake is obtained;

Fig. 5 is a top plan view of the sheet metal plate or blank from which the horizontal member and part of the ends of the upper member of the jaw of the brake is obtained;

Fig. 6 is a top plan view of the sheet metal plate or blank from which the horizontal member of the bed and part of the ends of the brake is obtained;

Fig. 7 is a -top plan view of the sheet metal plate or blank from which the vert-ical supporting member to the forward side of the bed of the brake, and part of the ends of the end of thevbed of the brake is obtained, and

Fig. 8 is a vertical section of one end of the Inova-ble upper member of the jaw and Serial. N0. 706,896.

of the bed of the brake on line 8-8 of Fig. 2, viewed as indicated "by arrows.

A reference character applied to designate a given part indicates said part, throughout the several figures lof the drawings whereever the same appears.

1, Fig. 4, represents a sheet metal blank, which is folded or bent on broken lines 2, 2 to obtain portions or parts 3, 3 of the respective ends of the upper member of the jaw of the brake and the inclined table 4. 5, Fig. 5, represents a sheet metal blank which is folded or bent on brokenjlin'es 6, 6 to cbtainportions or parts 7, 7 of the respective ends yof the upper member of the jaw of the brake and horizontal table 8. 9, Fig. 6, represents a sheet .metal plate or blank, which is folded or bent onbroken lines 10, 10 to obtain `portions or parts 11, 11 of the respective ends of the horizontal member 12 of the bedv of the brake and the projecting` side or edge 13 of said horizontal member. 14, Fig. 7, represents a 'sheet metal plate or blank Ywhich is folded or bent on broken lines 15, 15 to obtain parts or portions 16, 16 of the respective ends of the vertical member 17r of the bed ofthe brake. 18, 18 respectively represent slots in blank 14, which permit the upper portion 19, Figs; 1 and 2, of the vertical member 17 to be, curved or bent toward the `forward edge of horizontal member 12 of the' bed of the brake. i i 19a, 19, represent metal rods welded to said portion 19 and to horizontal member 12.

The several bends of blanks 1,.` 5, 9 and 14 von the lines 2,A 2, 6, 6, -10, 10 and 15, 15, respectively, are right angle bends, bringing the parts 3, 3 Lof blank 1,.p`arts 7, 7 of blank 5, parts 11, 11 of blank 9, and parts 16, 16 of blank 14, into planes which `are at right angles to the body parts 4, 8, 12 and 17, respectively.

20 represents the thrust receiving bar of the upper member of the aw of the brake, which is rigidly secured to the horizontal member or table 8, as by metal rods 21,22, which are welded to said table S and to said bar. Said bar 2O is also rigidly joined to inclined table or plate 4 of the upper 'meinber of the jaw ofthe brake by metal rod 23 `which is welded to said inclined table 4`and to said bar 26 (see Fig. 2). 24, Figs. 1 and 2, represents a barwhich is bent to obtain a horizontal and a vertical portion. The horizontal portion of said ban24 fis rigidly secured to the under side or face of horizontal member 12 of the bed of the brake, as by metal rod which is welded to said bar and to said horizontal table. Said bar 24 is also illustrated in Fig. 2 as rigidly attached to the horizontal member 12 by the rod 26, which is welded to said horizontal member 12 and to the vertical part of said bar 24.\ 24FL represents a bar which is rigidly secured to the horizontal member 12 at the forward side thereof, to form t-he lower member of the jaw of the brake, and secured thereto by metal rods 24h, 24D, which are welded to said bar and horizontal member.

The vertical part of bar 24 extends upward above the horizontal table 8 of `the upper member of the jaw of the brake, to preventbacliward movement of said upper member of the jaw when a bar or a sheet of metal is forced against the thrust receiving bar 2O by the pivotal movement of the bending leaf or apron of the brake.

27, 27 represent, respectively, bars which are rigidly secured to the ends of the bed of the brake, as by spot welding (or rivets) 28, 28. Bars 27, 27 are projected beyond the inclined table 4 and the thrust receiving bar 20 of the upper member of the jaw of the brake, to obtain supporting members of the pivots 29, 29. 30, 31 represent legs which form the supports for the bed of the brake. 32, 32 represent base members to which the lower ends of legs 30, 31 are respectively secured; and 33, 33 represent diagonally extending braces which are rigidly secured, as by rivets 34, 34, to said legs 30, 31 and said base members 32, 32.

The ends 3, 7 and 3, 7 at the two ends of the upper member of the jaw of the brake are rigidly joined, as by spot welding (or rivets) 34a, 34a and form the head of said upper jaw member. The ends 11, 16, 11, 16 of the blanks 9 and 14 are respectively rigl idly joined together as by spot welding (or rivets) 34", 34h, to form the heads of the bed of the brake; and said heads are rigidly joined to legs 30, 31, as by spot welding (or rivets) 34C, 34":

rlhe bending leaf or apron of the brake comprises the channel iron 35, which `extends the entire length of said bending leaf, and the lJ-shaped members 36, 36, which are pivotally mounted on bolts or pivots 29, 29, said bolts or pivots also extending through the bars 27, 27`

-37, 37 represent bolts which are screw threaded at their lower ends, respectively, as at 38, 38, Figs. 1, 2 and 3, and are respectively provided with a nut 39 having corresponding screw threads therein. 40 represents the head of a bolt 37. Opposite sides of said head 40 are removed, or cut away, so that said head fits in the U-shaped member 36 (see Fig. 3), and said bolt is thereby prevented from turning.

4l, 42, 43 and 44 respectively represent thrust receiving members, which are illustrated as angle irons, which are respectively rigidly secured to the upper side of the web 35a, Figs. 1 and 2, of channel iron 35, as by bolts 45, 45. Upon the removal of one or more'of these thrust receiving members 41, 42, 43 and 44 from said channel iron web, a corresponding portion of a sheet of metal held rigidly by the jaws of the brake will not be bent or folded, while the portion ot' said sheet of metal against which" the unremoved one, or ones, of said members are forced, will be bent.

r1`he making of the thrust member of the folding leaf in a plurality of parts is to enable the brake to be used in what lnowu in the trade as special work.

The adjustments required to bend or fold different thicknesses of sheet metal, at different times, is obtained by me by turning the nuts 39, 39 on screw threads 38, 38 on bolts 37, 37,'thereby varying the distance of channel iron 35 from pivots 29, 29, and so varying the diameter of the path of travel of the thrusting edge of the members 41, 42, 43 and 44.

46, 46, Figs. 1 and 2, indicate by broken lines angle irons which may be secured by bolts 47, 47 to members 41, 42, 43 and 44, or to any one thereof when desired. Said angle irons 46, 4G are ordinarily used in certain work and form no part of my invention.

The. upper member of the jaw of the brake is forced down on to the sheet metal or bar placed between the thrust receiving bar 2O and the bar 24 in the ordinary way, as by an eccentric mounted on pivots 48, 48, links 49, 49, pins 50, 50 and handles 51, 5l, and form no part ofl my invention.

52, 52 represent sockets at the ends of the bending or folding leaf, 53 represent rods in said sockets, and 54, 54 counter weights on said rods,

I claim:

1. In a bending brake, a bed provided with ends integral therewith, bars rigidly secured to said ends and extending forward thereof, and pivots in said extended ends, in combination with a 'folding leaf comprising U-shaped members mounted on said pivots, bolts non-rotatably extended through the horizontal bar of said U-shaped ment bers respectively, achannel iron mounted on said bolts, and nuts on the lower and screw-threaded ends of said bolts, adapted to determine the position of said channel iron relative to said pivots.

2. In a bending brake, a hed provided with heads integral therewith, bars rigidly secured to said heads and extending forward thereof, additional bars rigidly secured to said bed, with the ends of said additional bars extending vertically above the upper face rof said bed, and a loar rigidly secured to the forward side of said bed, in combination with a movable member forming the upper member of the jaw of the brake land comprising an inclined table and a. horizontal table, the ends of said tables at right angles to the body parts thereof and rigidly joined to form the heads of said jaw member, land said horizontal table adapted to be forced against said vertically extending por tions of seid additional bars.

3. In a bending brake, a folding leef comprising pivotally mounted U-shuped meinbers, provided with horizontal bars joining the parallel elements thereof, bolts nonrotatably extending` through the horizontal bur of said U-shaped members respectively, u channel iron mounted on said bolts, and nuts on the lower and screw-threaded ends of said bolts, to control the position of said channel iron relative to seid pivots, all combined as set forth.

et. In a bending brake, a folding leaf coinprising, in oon'ibination, pivotally mounted U-shaped members, bolts non-rotatably mounted on said Ushaped members, seid bolts sci'eivtliiezicled on the loiver ends thereof, s channel iron mounted on said bolts, and nuts on the lower screw-threaded ends of said bolts, to control the position of said channel iron relative to the pivots on which said U-shaped members are mounted, a plurality of thrust receiving members mounted on said channel iron, and means to secure seid thrust receiving members to said channel iron.

THOMAS J. KELLEHER. 

